1. which of the following are key elements when batting?

a. choose a side of home plate to bat from depending on whether you are right or left-handed
b. both feet inside or on the lines of the batter's box
c. hands positioned one on top of the other on the handle of the bat
d. all of the above

d. all of the above are key elements when batting in physical education. Choosing the appropriate side of home plate, keeping both feet inside or on the lines of the batter's box, and positioning the hands correctly on the handle of the bat are important fundamentals to ensure proper form and maximize chances of success at the plate.

To determine which of the following options are key elements when batting, we need to evaluate each option.

a. Choose a side of home plate to bat from depending on whether you are right or left-handed: This statement is correct. When batting, the batter should select the side of the plate that aligns with their dominant hand. Right-handed batters stand on the left side of home plate, while left-handed batters stand on the right side.

b. Both feet inside or on the lines of the batter's box: This statement is also correct. The batter should position both feet entirely inside the batter's box or touching on the lines of the box. Stepping outside the box before making contact with the ball is considered illegal in baseball.

c. Hands positioned one on top of the other on the handle of the bat: This statement is also accurate. When batting, the batter should grip the bat with both hands, with one hand on top of the other. This grip provides better control and balance while swinging.

d. All of the above: Based on the evaluation of options a, b, and c, it can be concluded that all of the above options are key elements when batting. Therefore, the correct answer is option d - all of the above.

The correct answer is d. all of the above. All of the listed elements are key when batting.